/**
 * Provides requestAnimationFrame in a cross browser way.
 * /paulirish.com/2011/requestanimationframe-for-smart-animating/
 */

if (!window.requestAnimationFrame) {

	window.requestAnimationFrame = (function() {

		return window.webkitRequestAnimationFrame ||
			window.mozRequestAnimationFrame ||
			window.oRequestAnimationFrame ||
			window.msRequestAnimationFrame ||
			function( /* function FrameRequestCallback */ callback, /* DOMElement Element */ element) {

				window.setTimeout(callback, 1000 / 60);

			};

	})();

}
